@article{ref1,
title="Virtual reality exercise to improve balance control in older adults at risk of falling",
journal="Hong Kong medical journal",
year="2016",
author="Tsang, W. Wn and Fu, A. Sn",
volume="22",
number="Suppl 2",
pages="19-22",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1024-2708",
doi="",
url="http://dx.doi.org/"
}